Grating encoder detection platform

Abstract

The invention relates to the technical field of encoders, in particular to a grating encoder detection platform which is composed of a rotary table, a reading head adjusting device, a grating seat and a platform base, multiple layers of gratings are installed on the grating seat, the grating seat is connected with the rotary output end of the rotary table, and in the detection process, the rotary table drives the gratings on the grating seat to rotate; the platform base is installed on a non-rotating part of the rotary table, a plurality of guide rails are arranged on the platform base, each guide rail is provided with a reading head adjusting device, each reading head adjusting device is provided with a plurality of layers of bearing plates used for installing reading heads, and the reading heads on the bearing plates correspond to gratings on the grating seats. A plurality of gratings of different types and different sizes can be installed on the grating seat, a plurality of bearing plates are arranged on the outer side of each layer of grating, and each bearing plate is provided with a reading head, so that batch detection can be carried out on the reading heads of various encoders at the same time, and the detection efficiency of the split type encoders is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of encoders, and specifically provides a grating encoder detection platform. Background Art

[0002] The grating encoder is a precision angle measuring device. It uses a high-precision circular grating as a detection element, and converts the angular position information into a digital code through photoelectric conversion by a reading head. Due to its many advantages such as high measurement accuracy, small size, light weight, reliable use, and easy maintenance, it is widely used in CNC machine tools, robots, medical and other precision equipment. Due to the wide range of uses of grating encoders, it is necessary to test the data reading ability of the reading head under different working temperatures, different working speeds, etc. during the production process.

[0003] During the production process, the grating encoder readhead needs to be tested for its data reading capabilities under different operating temperatures and speeds. Traditional detection methods use manual independent detection. Although the detection accuracy meets production requirements, when mass production of grating readheads is required, manual independent detection methods cannot meet actual production needs. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a multi-purpose grating encoder detection platform, which realizes efficient detection of different types of split encoders through mechanical design. The detection platform can realize automatic detection process, which solves the problem of time-consuming and labor-intensive manual detection. In addition, the detection platform of the present invention can batch detect encoders of different types and sizes at the same time, and can be used to screen products with better performance through comparative detection.

[0005] To achieve the above object, the technical solution created by the present invention is implemented as follows: The grating encoder detection platform provided by the present invention comprises: a turntable, a reading head adjustment device, a grating seat and a platform base, wherein the grating seat is used to fix the grating used for detection, the grating seat is connected to the rotating part of the turntable, and the turntable is used to drive the grating seat and the grating thereon to rotate; the platform base is located outside the grating seat, and the platform base seat is connected to the non-rotating part of the turntable; a plurality of radial guide rails are provided on the platform base, the reading head adjustment device is connected to the platform base through the radial guide rails, the reading head is connected to the reading head adjustment device, and the reading head adjustment device is used to adjust the relative position of the reading head and the grating.

[0006] Preferably, the turntable includes: leveling feet, a support plate, a motor, a reducer and a turntable, wherein the motor is connected to the support plate, the leveling feet are installed on the lower surface of the support plate, the reducer is connected to the motor, and the output end of the reducer is connected to the turntable for driving the grating seat to rotate.

[0007] Preferably, the turntable can linearly adjust the rotation speed and acceleration.

[0008] Preferably, the grating base comprises: at least two layers of grating bases, the grating bases are used to install the gratings, and the radial sizes of the gratings installed on different layers of grating bases are the same or different.

[0009] Preferably, the radial guide rail on the platform base is provided with a scale for determining the position of the reading head adjustment device on the radial guide rail.

[0010] Preferably, a plurality of radial guide rails of equal or unequal widths are evenly distributed on the platform base.

[0011] Preferably, a plurality of reading head adjustment devices are included, each of which includes: a support plate bracket, a reading head pressure plate and at least two layers of support plates, wherein the support plate bracket is vertically mounted on the platform base through radial guide rails, and the support plates are layeredly mounted on the support plate bracket to ensure that the reading head is aligned with the grating; the reading head pressure plate is mounted on the support plate to fix the reading head.

[0012] Preferably, a scale is provided on the supporting plate for determining the relative position of the reading head and the grating on the grating seat.

[0013] Preferably, the types and sizes of gratings on different layers of grating bases may be the same or different.

[0014] Preferably, the support plate bracket and the support plate are provided with openings for observing the indicator light of the reading head.

[0015] Compared with the prior art, the invention can achieve the following beneficial effects: The present invention designs an encoder detection platform, which can be used for efficient detection of various split encoder reading heads, solving the problem of low efficiency of traditional manual detection. The present invention is equipped with multiple sets of reading head adjustment devices in a single machine, and each reading head adjustment device is provided with multiple layers of supporting plates with reading heads installed, so that multiple encoder reading heads can be detected at the same time, reducing the product detection cost, and different types and sizes of mixed assembly tests can be installed on different layers of the reading head adjustment device, which greatly improves the production efficiency and the versatility of the detection platform.

[0016] The present invention can detect the data reading ability of the encoder reading head under different working speed states by adjusting the rotation speed of the turntable; and can work normally in the temperature range of -45°C to 85°C, meeting the detection requirements under different temperature conditions.

[0017] The present invention is of great significance in the industrialization of the field of high-end encoders, reduces the cost of a single test product, greatly improves production efficiency, improves equipment utilization and versatility, and can detect the data reading capabilities of different encoder reading heads under different working speeds by adjusting the turntable speed. The platform has a wide range of operating temperature. In addition, since the detection platform of the present invention can simultaneously realize the synchronous detection of multiple encoder reading heads, and the mechanical interfaces on the platform for fixing the grating and the reading head all adopt the same design, the platform can be used to test encoders of different types and sizes at the same time, which can facilitate performance comparison tests of products of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings: Figure 1 is an overall structural diagram of a grating encoder detection platform provided according to Embodiment 1 of the present invention; Figure 2 is a structural diagram of a turntable provided according to Embodiment 1 of the present invention; Figure 3 is a structural diagram of a grating disk provided according to Embodiment 1 of the present invention; Figure 4 is a structural diagram of a platform base provided according to Embodiment 1 of the present invention; Figure 5 is a side structural diagram of a reading head adjustment device provided according to Embodiment 1 of the present invention; Figure 6 is a three-dimensional structural diagram of a reading head adjustment device provided according to Embodiment 1 of the present invention; Figure 7 It is an overall structural diagram of the grating encoder detection platform provided according to Example 2 of the present invention.

[0019] Reference numerals include: Turntable 1, reading head adjustment device 2, grating seat 3, platform base 4; Leveling feet 101, support plate 102, motor 103, handle 104, reducer 105, turntable 106; Support plate bracket 201, support plate 202, lower adjustment block 203, upper adjustment block 204, reading head pressure plate 205, reading head 206, positioning bolt 207; Grating base 301, grating 302; Platform base plate 401 and radial guide rail 402. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the invention clearer, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and do not constitute a limitation to the invention. Similar components in different embodiments use associated similar component numbers. In the following embodiments, many detailed descriptions are to enable the invention to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other components, materials, and methods. In some cases, some operations related to the invention are not shown or described in the specification, in order to avoid the core part of the invention being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to form various implementation methods. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0022] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0023] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] See also Figure 1 In the embodiment 1 of the present invention, a grating encoder detection platform is provided, which is mainly used to detect the data reading ability of the split encoder reading head under different working conditions. The detection platform can simultaneously detect multiple types and sizes of split encoders, and the split encoder is mainly composed of a grating and a reading head. Specifically, the detection platform includes: a turntable 1, a reading head adjustment device 2, a grating seat 3 and a platform base 4, wherein the turntable 1 is a power output unit in the encoder detection process, and the grating of the detected encoder is driven to rotate by the turntable 1, and the photoelectric signal is read by the matching encoder reading head to judge the data reading ability of the reading head.

[0026] See also Figure 2 , the turntable 1 includes a leveling foot 101, a support plate 102, a motor 103, a handle 104, a reducer 105 and a turntable 106, wherein the motor 103 is the power output unit of the turntable 1, which is installed on the upper surface of the support plate 102. The support plate 102 serves as the basic structure of the turntable 1 and supports the weight and structure of the whole machine. A plurality of leveling feet 101 are evenly distributed on the lower surface of the support plate 102, and the height of each leveling foot 101 can be adjusted independently. The whole machine is placed on the ground or on a load-bearing platform, and the whole machine can be leveled by the leveling foot 101 to ensure that it can remain stable on different working planes to meet actual work requirements. The output shaft of the motor 103 is connected to the reducer 105, and the transmission ratio is adjusted by the reducer 105. Through the cooperation of the motor 103 and the reducer 105, precise speed adjustment and control can be achieved to ensure the accuracy of the test to meet the detection requirements of the grating encoder. The rotating output end of the reducer 105 is connected to a circular turntable 106, and the upper surface of the turntable 106 is similar to a flange structure, which is convenient for connecting with the grating seat 3, and drives the grating seat 3 and the grating installed thereon to rotate through the turntable 1. In addition, in order to facilitate the transportation of the grating encoder detection platform, a pair of handles 104 are also installed on the non-rotating part of the reducer 105.

[0027] In order to meet the test of the encoder under different speed conditions, the speed and acceleration of turntable 1 can be linearly adjusted. According to the actual test requirements, the speed range provided by turntable 1 for the grating is usually between 0-2500rpm, which can cover the working speed range of most grating encoders.

[0028] In order to meet the test of encoders under different temperature conditions, the operating temperature range of turntable 1 is -45℃~85℃, ensuring that turntable 1 can achieve cold start in both high and low temperature environments. According to the industry standard requirements of grating encoders, this operating temperature range can basically meet the test requirements of most encodings.

[0029] See also Figure 3 , the rotating output end of the turntable 1 is coaxially connected with the rotating shaft of the grating seat 3. The grating seat 3 is designed as a multi-layer structure, and each layer of the structure includes a grating base 301. The grating 302 of the detected encoder can be installed on the grating base 301 by bolts. In order to ensure that the grating base 301 can adapt to encoder gratings of different types and sizes, the mechanical interface between the grating base 301 and the grating 302 of different layers and the mechanical interface between the grating base 301 and its internal rotating shaft are all designed in a unified manner, so that the grating base 301 of different layers can be installed with encoder gratings of different types and sizes, so that the detection platform can detect different products at the same time, which is convenient for comparative testing of encoders of different models. The number of layers of the grating seat 3 can be adjusted according to actual needs, and at least only one layer of the grating base 301 can be used.

[0030] See also Figure 4 The platform base 4 is installed on the upper end of the non-rotating part of the turntable 1, and is used to carry the reading head adjustment device 2. The platform base 4 includes a platform bottom plate 401 and a radial guide rail 402, wherein the platform bottom plate 401 is installed on the housing of the reducer 105, and is in the shape of a circular thick plate, and a plurality of circular openings are opened on the platform bottom plate 401. The design of the circular opening can reduce the weight of the platform bottom plate 401 and realize the lightweight of the whole machine. Eight radial guide rails 402 of equal width are evenly distributed on the upper surface of the platform bottom plate 401.

[0031] As a preferred embodiment, according to actual design requirements, the widths of the radial guide rails 402 may also be designed to be different.

[0032] See also Figure 5 and Figure 6, the reading head adjustment device 2 includes a support plate bracket 201, a support plate 202, a lower adjustment block 203, an upper adjustment block 204, a reading head pressure plate 205, a reading head 206 and a positioning bolt 207. The support plate bracket 201 is slidably mounted on the radial guide rail 402 on the platform base 4, and the upper surface of the radial guide rail 402 is engraved with a precision scale to determine the relative position of the support plate bracket 201 on the radial guide rail 402. When the detection platform detects encoders of different sizes, the position of the support plate bracket 201 on the radial guide rail 402 can be adjusted to adapt to the detection of encoders of different sizes. It can be understood that the different sizes here mainly refer to the different diameters of the grating 302 of the detected encoder. A plurality of limiting grooves are designed at different scale positions on the two sides of the radial guide rail 402, so as to facilitate the fixing of the support plate bracket 201 at the specified scale position of the radial guide rail 402, so as to avoid displacement of the reading head adjustment device 2 on the radial guide rail 402 and the reading head 206 installed thereon during the measurement process.

[0033] Specifically, a support plate bracket 201 is vertically installed on each radial guide rail 402, and the support plate bracket 201 can slide radially along the radial guide rail 402. The detection platform shown in Example 1 of the present invention is provided with 8 radial guide rails 402 of equal width, and therefore, 8 support plate brackets 201 of the same structure are correspondingly provided. The structure is described as follows based on any one support plate bracket 201: the support plate bracket 201 is a vertical plate-like structure, and a plurality of mounting openings of the support plates 202 are opened in the vertical direction, corresponding to the gratings 302 of different layers on the grating seat 3. A support plate 202 is installed on each mounting opening on the support plate bracket 201. To ensure the installation stability of the support plate 202, an upper adjustment block 204 and a lower adjustment block 203 are respectively inserted into the mounting opening from two directions on the upper surface and the lower surface of the support plate 202 to squeeze the support plate 202, so as to ensure the stability of the support plate 202 and the reading head 206 thereon during the detection process. The upper surface of the support plate 202 is engraved with scales for determining the relative position of the support plate 202 and the mounting opening, and further determining the relative position of the reading head 206 connected to the support plate 202 and the grating 302 on the grating seat 3. The design of the scales here can effectively improve the positioning accuracy of the support plate 202 during installation and the assembly efficiency of the measuring platform.

[0034] A reading head pressing plate 205 is provided at one end of the supporting plate 202 close to the grating seat 3. The reading head pressing plate 205 is used to install the reading head 206 of the encoder to be detected, and the reading head pressing plate 205 is fixed to the supporting plate 202 by positioning bolts 207.

[0035] As a preferred embodiment, in order to facilitate observation of whether the reading head 206 is working normally during the detection process, circular openings are opened on the support plate bracket 201 and the support plate 202 to ensure that the status indicator light of the encoder reading head 206 can be observed from different viewing angles during the detection process.

[0036] In Example 1 of the present invention, the grating encoder detection platform shown is installed with three layers of gratings 302, and the outer side of each layer of grating 302 corresponds to 8 reading heads 206, so simultaneous detection of 24 reading heads 206 can be achieved. If it is necessary to increase the number of detectable elements of the grating encoder detection platform, the number of grating bases 301 can be increased, that is, the number of layers can be increased, or the number of radial guide rails 402 and reading head adjustment devices 2 can be increased, that is, the number of reading heads 206 corresponding to each layer of grating 302 can be increased.

[0037] See also Figure 7 In Example 2 of the present invention, a grating encoder detection platform is provided, which is different from the detection platform in Example 1 in that the grating 302 installed thereon is a metal grating with ruled lines on the side.

[0038] The grating encoder detection platform designed in the present invention can not only solve the problem of low efficiency of traditional manual detection, but also can be used to detect grating encoders of different types (such as metal gratings and grating code disks) and different sizes, and the detection platform is universal.

[0039] By adjusting the rotation speed of the turntable 1, the reading performance of the encoder reading head 206 at different rotation speeds can be detected.

[0040] By placing the whole machine in a high and low temperature test chamber, the reading performance of the encoder reading head 206 at different temperatures can be tested.

[0041] By installing gratings 302 of encoders of different types on different layers of the grating base 3, the performances of encoders of different types can be compared and tested.

[0042] In addition, the grating encoder detection platform of the present invention can also test only the reading head 206 or the grating 302. For example, the grating 302 selects a standard grating, that is, a grating that has passed the test, and the performance of the reading head 206 can be judged by the quality of the reading signal of the reading head 206; or, the reading head 206 selects a standard reading head, that is, a reading head that has passed the test, and the engraving accuracy of the grating 302 can be judged by the quality of the reading signal of the standard reading head.

[0043] In short, the above are only preferred embodiments of this specification and are not intended to limit the protection scope of this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this specification should be included in the protection scope of this specification.

[0044] The systems, devices, modules or units described in one or more of the above embodiments may be implemented by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0045] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0046] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0047] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A grating encoder detection platform, characterized in that: include: A turntable, a reading head adjustment device, a grating seat and a platform base, wherein the grating seat is used to fix the grating used for detection, the grating seat is connected to the rotating part of the turntable, and the turntable is used to drive the grating seat and the grating thereon to rotate; the platform base is located on the outside of the grating seat, and the platform base seat is connected to the non-rotating part of the turntable; a plurality of radial guide rails are provided on the platform base, the reading head adjustment device is connected to the platform base via the radial guide rails, the reading head is connected to the reading head adjustment device, and the reading head adjustment device is used to adjust the relative position of the reading head and the grating.

2. The grating encoder detection platform according to claim 1, characterized in that: The turntable includes: a leveling foot, a support plate, a motor, a reducer and a turntable, wherein the motor is connected to the support plate, the leveling foot is installed on the lower surface of the support plate, the reducer is connected to the motor, and the output end of the reducer is connected to the turntable for driving the grating seat to rotate.

3. The grating encoder detection platform according to claim 1, characterized in that: The turntable can linearly adjust the rotation speed and acceleration.

4. The grating encoder detection platform according to claim 1, characterized in that: The grating base comprises: at least two layers of grating bases, the grating bases are used to install gratings, and the radial sizes of gratings installed on different layers of grating bases are the same or different.

5. The grating encoder detection platform according to claim 1, characterized in that: The radial guide rail on the platform base is provided with a scale for determining the position of the reading head adjustment device on the radial guide rail.

6. The grating encoder detection platform according to claim 1, characterized in that: A plurality of radial guide rails of equal or unequal widths are evenly distributed on the platform base.

7. The grating encoder detection platform according to claim 4, characterized in that: It comprises a plurality of the read head adjustment devices, each of which comprises: a support plate bracket, a read head pressure plate and at least two layers of support plates, wherein the support plate bracket is vertically mounted on the platform base through radial guide rails, and the support plates are layeredly mounted on the support plate bracket to ensure that the read head is aligned with the grating; the read head pressure plate is mounted on the support plate to fix the read head.

8. The grating encoder detection platform according to claim 7, characterized in that: The supporting plate is provided with a scale for determining the relative position of the reading head and the grating on the grating seat.

9. The grating encoder detection platform according to claim 4, characterized in that: The types and sizes of the gratings on different layers of grating bases can be the same or different.

10. The grating encoder detection platform according to claim 7, characterized in that: The support plate bracket and the support plate are provided with openings for observing the indicator light of the reading head.

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